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内昆铁路老锅厂至李子沟段,为长距离斜坡软岩软土地带,气候恶劣,地质条件复杂。以软岩填料填筑高路堤,既要满足挡护工程的长期稳定性,又要避免地基抗剪强度不够引起路堤侧向整体滑动及边坡外侧土体隆起;既要保证路堤基底施工处理质量,又要避免人工构造物与路堤衔接处产生差异沉降。本文通过对DK440+360～DK440+720段软岩路基处理的试验成果分析,研究了内昆铁路软岩路基的工程性能,对软岩路基施工技术进行了研究,并在施工实践中取得了良好的效果。
The old pot plant in Nei Kun Railway to the Li Zigou section is a soft rock zone with soft rock in long distance slopes with poor weather conditions and complicated geological conditions. Filling soft rock fill high embankment, it is necessary to meet the long-term stability of the retaining project, but also to avoid the base shear strength is not enough to cause the overall lateral slide embankment and slope soil bulge; it is necessary to ensure the quality of the embankment base construction and processing , But also to avoid the artificial settlement and embankment junction discrepancy settlement. In this paper, through the analysis of the test results of DK440 + 360 ~ DK440 + 720 soft rock subgrade treatment, the engineering performance of soft rock subgrade in Nei Kun railway has been studied. The construction technology of soft rock subgrade has been studied and achieved good in construction practice Effect.